Oak Processionary Moths

The Oak Processionary Moth (Thaumetopoea processionea) is a pest that lives on oak trees and poses a risk to human and animal health.

Health risk

The caterpillar of this moth comes out in April every year and produces thousands of irritating hairs. These can cause skin rashes, sore throats, breathing difficulties and eye problems if you or your pet comes into contact with them.

What to do if you see or touch them

If you see any Oak Processionary Moth nests or caterpillars (OPM) you should report them immediately.

• If they are on a privately owned oak tree, report them to the Forestry Commission using the Tree Alert online pest reporting form. If you cannot use Tree Alert, you can report them by calling 0300 067 442 or by email at opm@forestry.gsi.gov.uk
• If they are on a council-owned tree, report it to our parks department 020 7364 5000 or at parks@towerhamlets.gov.uk.

It is important not to come into contact with the caterpillars, hairs or nests.

If you think you have been exposed and have an itching skin rash and/or conjunctivitis or other symptoms see a pharmacist to relieve the symptoms. If you have a more serious allergic reaction, contact your GP or call NHS Direct on 111. The call is free from any phone.
Consult a vet if your pet has a serious reaction. It is important to restrain pets from approaching nests or caterpillars.

Advice for contractors

Regulations are in place which affect how contractors working with Oak trees should be handling material within the Oak Processionary Moth affected areas.